Apparatus for producing bolt nuts



Patented Mar. 10, 1931 UN ED STATES PAT-ENT- OFF 16E WILLIAM E. SHARP,or CHICAGO, rumors APPARATUS ron-r'nonucme BOLT News Application fi1edApril 21,

pierce the same, punch bolt-receiving apertures in the blank, andseparate the nut blanks from the slugs stamped therefrom so that it willnot be necessary to have additional ap paratus for separating the slugsfrom the blanks.

One form of the invention is embodied in apparatus adapted to severpredetermined lengths from bars of metal, to provide nut stamped fromthe blanks being ejected from the apparatus through a path separate anddistinct from the path through which theblanks are ejected.

Many, other objects and advantages of the construction herein shown anddescribed will be obvious to those skilled in the art from thedisclosure herein given.

To thisend my invention consists in the novel construction, arrangementand combination of parts herein shown and described, and moreparticularly pointed out in the claims. a

In the drawing, wherein like reference characters indicate like orcorresponding parts through apparatus embodying the invention;

Fig. 2 vis a section taken substantially on the same line as Fig. 1 butshowing certain parts of the apparatus inchanged positions; Fig. 3 is asection taken substantially on thesame line as Fig. 1 but showingcertain parts of the apparatus in positions wherein they function toseparately eject blanks and slugs from the apparatus; and;

.1928. Serial No. 103,565."

Fig. 4 is a section taken'on line 44 of Fig. 1. v v

It will become apparent as the following description oprogresses thatthe apparatus shown in the drawing is subject to many modifications, toenable it to produce nut blanks of different shapes, and that it mayalsobe modified toform thenut blanks from different stock. Therefore,certain parts of the apparatus shown in the drawing are merelyillustrative, and the invention is not limited thereto. Y

Referring to the drawing, the reference character 10 designates a dieblock which is mounted in a frame lland is provided with an 14. As shownin Fig. 4, a stop 16 is fixed to the front face of the die block 10 sothat one end of a bar 17 may be accurately, registered with the aperture'12, the apparatus being adapted toform nut blanks from the bar 17.,blanks and to then pierce such blanks toprovide bolt-receivingapertures, the slugs' The die 13 is slidably journaled in amember 20forming part of the frame 11 and is provided with a central longitudinalbore 21111 which a plunger or ejecting tool 23 is slidably journaled.Similarly,.the punch 14 1s slidably journaled in a'membe'r 25 formingpart of the frame 11, the punch 14 being pro-- vided with a centrallongitudmal bore 26 1n which a plunger or ejecting tool 2"?- 1s slidablyjournaled.

Formed in the diefblock 10 and the frame 11 are aligned bores 29 and 30,respectively, in which a plunger 32 is slidably mounted, the plungerbeing disposed at an angle to the longitudinal axis of the aperture 12.'-Adjustably mounted upon the outer end of the plunger 32 is a block 33having a groove 34 1 which accommodates the free end of a lever Fig. 1is a fragmentary section taken.

35. Themeans for adjustably mounting the block 33 upon the plunger 32preferably comprises nuts 36 screw-threaded upon .the plunger. The leverorequivalent member issecured to a shaft 39 pivoted in a bracket 40'which is mounted upon the frame 11. The

shaft39 may be oscillated by any preferred means through the medium. ofa leverv 42 which is fixed thereto.

Suitable mechanism (not shown) is oper- 05 aperture 12 aligned with adie 13 and a punch atively connected to the lever 42 and, to the die andplunger, and the ejecting tools slidably j ournaled in the die andplunger to actuate them in the manner described below. It is not deemednecessary to show the mechanism for actuating these parts as the detailsthereof do not form a part of this invention.

Projecting into the bottom side of the die block 10 and communicatingwith the aperture 12 is an opening 44, the lower end of whichcommunicates with an opening 45 provided in the frame 11. The opening 45terminates in a chute 46 formed by plates, walls or partitions 47 and 48which are secured to the frame 11.

The operation of the above described apparatus is substantially asfollows: Assuming that the several movable parts of the apparatus are inthe positions wherein they are shown in Fig. 1, the bar 17 is advanceduntil it abuts the stop 16 (Fig. 4) and the apparatus is then set inoperation. The punch 14 then advances and severs a predetermined lengthof material from the bar 17 to form a blank which is advanced into theaperture 12 (Fig. 2) until it abuts the die 13, the die 13 beingsimultaneously advanced into the aperture 12. The punch 14 and the die13 are adapted to impart or forin a concave-convex cross-section to theblank. As illustrated in Fig. 2, the blank is indicated at 50 in thisfigure. However, the invention is not limited to this feature. While thedie and punch are imparting the concavo-convex cross-section to theblank 50, or immediately thereafter, the piercing member 23 is advancedto punch the bolt-receiving aperture 51 in the blank, the piercingmember 23 being adapted to drive a slug 52 from the blank into the bore26. The punch and die are then retracted into the positions wherein theyare shown in Fig. 3, the ejecting member 27 lagging behind the diemember 14 in such manner that it drives the slug 52 therefrom (Fig. 3).In some instances, I may prefer to hold the ejecting tool 27 stationarythroughout the entire cycle of operations, as the relative movementbetween it and the punch will serve to eject the slug from the punch.During the time the die and punch are being withdrawn from the aperture12, the plunger 32 is advanced into the aperture 12 to drive the blank50 through the openlugs 44 and 45 into the chute 46. Of course, theapparatus is preferably so timed that the piercing tool 23 is Withdrawnfrom the blank 50 before the punch and die are retracted and the plunger32 preferably engages the blank during the initialportions of the returnstrokes of the plunger and die. This prevents the blank from adhering toeither punch or die.

When the slug 52 is ejected from the bore 26 in the punch 14, it fallsupon the plate, Wall or partitions 48 and is guided thereby into anysuitable receptacle (not shown). The nut blanks ejected from theaperture 12 through the openings 44 and 45 and thence into the chute 46preferably fall into another receptacle (not shown). This constructionis advantageous in that it then becomes unnecessary to manually orotherwise separate the slugs from the blanks.

Having thus described my invention, it is obvious that variousimmaterial modifications may be made in the same without depunchingmechanism arranged to punch a bolt-receiving aperture therein, and meansfor discharging the blank through a downwardly opening aperture in saidblock.

2. In a machine of the kind described, means for cutting a nut blankfrom a bar and forcing it into a die block to form concavoconvexsurfaces thereon, punching mechanism arranged to punch abolt-receivingaperture therein, and means for automatically separately ejecting theblank and the punched slug in different ,directions from the 4 machine.

3. In a machine, a die block having an aperture therethrough, a punch, adie, a piercing tool, said punch, die and piercing tool being shaped andmovable longitudinally in said aperture to form nut blanks withconcavo-convex surfaces and having bolt-receiving aperturestherethrough, and driven means movable transversely of said die-blockfor ejecting said nut blanks from the dieblock.

4. In a machine, a die block having an aperture therethrough and anangularly disposed passage connecting therewith, a'punch, a die, apiercing tool, said punch, die and piercing tool being shaped andmovable in said aperture and being operably timed to form nut blankswith concavo-convex surfaces and having bolt-receiving aperturestherethrough, and driven means movable transversely of said die-blockfor ejecting said nut blanks from the angularly disposed passage in thedie-block.

5. n a machine, a die block having a longitudinal aperture therethrough,a punch, a

die, a piercing tool, an ejecting tool mounted punch slugs from the nutblanks to form bolt-receiving apertures therein, said ejecting toolbeing adapted to eject the slugs from I in said longitudinal apertureand being operably timed to form nut blanks, the piercing tool beingadapted to punch slugs from the nut blanks to form bolt-receivingapertures,

and the said ejecting tool being adapted to eject the slugs from thepunch, and a plunger movablejn said transverse aperture for ejectingsaid nut blanks from the die block, and means forming independent pathsthrough which the nut blanks and slugs are discharged from the machine.-I

7. Apparatus for manufacturing nuts comprising a die block with alongitudinal aperture therethrough and atransverse passage for forming alongitudinal aperture therein and forcing the material removed into thefirst-mentioned means, and means for ejecting said blank transverselyfrom said die block.

In testimony whereof, I have hereunto signed nay-name.

WILLIAM E. SHARP.

connecting therewith, a die adapted to reciprocate therein and a punchadapted to enter and reciprocate in said'block to cooperate with saiddie and cut off a blank of metal from stock and force it against saiddie, a piercing tool adapted to reci rocate in said die and force a slugof metal om said blank into said punch, and a plunger for forcingv saidblank from the transverse passage in said die block. a a

8. Apparatus for manufacturing nuts com prising a die block, a dieadapted to reciprocate therein and provided with a ridged forming face,a punch adapted to enter and reciprocate in said die block for cuttingofi'" blanks from stock, said punch being provided with a forming facemating with the forming face of the die, a piercing tool adapted toreciprocate in said die for perforating a nut blank by forcing a slug ofmetal into said punch, an ejecting tool reciprocating in said punch forejecting said slug from said punch after withdrawal from said die block,

and a plunger operating in said die block for ejecting saidblanksfrom'said block.

9. A machine comprising a die block with I a longitudinal aperturetherethrou h, means for forcing pieces of metal into sai aperture forforming nut blanks, means movable into said aperture for punchingbolt-receivlng apertures in said nut blanks, means for positivelyejecting the blanks in a direction transverse to the axis of the blankforming means, separate means for ejecting the material removed from theblanks in punching said apertures axially of said forming means, and

means for preventing said material from mixing with the apertu'redblanks.

10. Apparatus for forming nuts comprising a die block, means for forcinga piece of metal longitudinally into said block, means

